Printing telegraph receiver



Much 1940- E. E. KLEINSCHMIDT 2,192,354

PRINTING TELEGRAPH RECEIVER Filed July 25, 1958 2 Sheets-Sheet l March 5, 1940.

E. E. KLEINSCHMIDT PRINTING TELEGRAPHRECEIVER Filed July 25, 1938 2 Sheets-Sheet 2 Edward [5. @mscfim iaf Patented Mar. 5, 1940 UNITED STATES PATENT OFFICE 25 Claims.

This invention relates to telegraph receivers of the type in which the selections are controlled by a permutation code selecting mechanism'and in particular, to improvements in the mechagnisms disclosed in my applications #18,888, filed April 29. 1935, #95883, filed Aug. 13, 1936, and #150,384, filed June 25, 1937. I

The mechanism shown and described herein is particularly adapted to the selecting mechanism shown in my aforesaid application #150,384.

The principal object of the invention is to provide simplified mechanisms for utilizing the first selective impulse to select from one of two groups of characters independently of the selective operations of the following selective impulses.

A further object of the invention is to provide means to permit a printing type wheel to rotate freely during the interval of its greatest acceleration which is accomplished byautomatically interrupting the contact between an inking device and the type wheel during a certain period in the cycle of operation of the type wheel.

Still a further object is the provision of a novel selector lever and support therefor wherein the disadvantages due to wear of prior devices are eliminated.

Further objects appear in the following, description and in the appended claims:

In the telegraph receivers shown and described in my application #18,888 it is necessary to rotate the stop wheel shaft at least two and one half times faster than the selecting shaft which, under high speed operation, is somewhat detrimental. The mechanism herein described overcomes this difiiculty in a simple and direct manner by providing a mechanism that will use the first unit of the code to operate a selection to rotate the type wheel independent of the stop wheel, and in which the stop wheel-selections will start with the second unit of the code thereby giving more time for the stop wheel to assume its normal start position after a previous printing operation as well as to increase the time during which the type wheel makes its initial 180 degree turn.

In my application #150,384 it is proposed to reduce the high speed of rotation of the stop wheel and the type by providing a mechanism operated under control of the first unit of the code to shift the type wheel axially and to use the remaining units of the code to control the rotary selected position in progressive steps. While the proposed improvement is effective in its object to reduce the required speed of the 55 stop wheel and the type, it is not easily applicable to the mechanism shown in application #95383 for selecting the operating bars of a typewriter, as well as for other uses where an axially movable recording device is not usable.

In the present invention the recording device 5 is not moved axially but is revolved one half turn under control of the first selective impulse, which occurs during the operating time of the following selective impulses and results in imparting a compound revolving action on the type 10 wheel or other recording device.

Referring to the drawings;

Figure- 1 shows the apparatus in perspective, all of the framework being eliminated so as to show the parts moreclearly.

Figure 2 is a detail of the sleeve for rotating the type wheel shaft by a camming action,

Figure 3 is a detail of the sleeve-operating mechanism shown in the operated position.

Figure 4 shows a mechanism for interrupting the contact between the type wheel and its inking roller.

Figure 5 is a side view of a preferred modification of the selector lever of my invention and the bearing or support therefor.

Figure 6 is a plan of the lever of Figure 5.

Figure '7 is a side elevation of the typewheel rotating lever together with mechanism associated therewith.

Figure 8 is a side elevation of the release lever 30 together with mechanism associated therewith.

Figure 9 is a side view of part of the normal stop lever and associated parts.

Figures 10, 11 and 12 are side views of a selecting lever in several different operating positions. 35

Figure 13 is a side view of part of the armature and associated stop lever.

Referring now to Figure 1, gear I, loosely mounted on shaft 2, is rotated ,in'a clockwise direction at a constant speed by a motor 29, an o idler-gear 3 connects gear I with gear 4, also rotated in a clockwise direction and loosely mounted on shaft 5; gear i tends to rotate shaft 2 by a friction coupling 6, and gear 4 tends to rotate shaft 5 by a friction coupling 1. Shaft 2 45 has fixed on it a cam assembly 8 and an orientable stop member 9. Cam assembly 8 consists of a latch release cam i0, four stop lever cams ii,

a normal stop lever cam 12, type wheel shift lever cam l3, and release lever cam 14. Latch release lever il rotates on stud i5 and operates latch l6. Four stop levers 19 are mounted on stud i5 and each has an elongated bearing aperture 30, see Figs. 10, 11 and 12, which permits a slight lateral displacement as well as rotation on stud I5. Normal stop lever I8 rotates on stud I5, see Fig. 9. Type wheel rotating lever 2|, also mounted on stud I5, has an elongated bearing aperture the same as stop levers I9-and is connected by pin 22 to the bifurcated end of lever 23. Release lever 24 rotates on stud I5 and bears against latch 25. Latch I6 and latch 25 rotate on stud 26 and are held in their unoperated positions by springs 21 and 28. Springs 3| hold stop levers I8 and I9 against the lower part of stud I5 and stop 32. Spring 33 holds type wheel shift'lever 2| against the lower part of stud I5 and stop 32.

A receiving magnet 34 is connected by wires 35 in the circuit of a transmitter not shown. Armature lever 36 has a bearing on stud3'l-and has I attached to it latch plate 38 and fulcrum plate 39. Armature lever 36 when retracted by spring 4| rests against stop screw4l. A stop lever 43 pivoted on stud 44 lies in the path of stop member 9 and holds shaft 2 against rotation when they are in engagement. Pin-'43 limits rotation of stop lever 43. Stop lever 43 has an extension 45 that rests on latch plate 38 when armature lever 36 is attracted, as shown in Figure 1. When armature lever 36 is released, under a no-current startcondition, spring 4| pulls armature 36-to the left against stop'42. In this position hooked end 41 of extension 45 of stop lever 43 is moved off latch plate 38, see Fig. 13. Stop lever 43 is now disengaged from stop member 9 by spring 46, leaving shaft 2 free to rotate with gear I until lug 48 on stop member -9 engages with cam extension'49 of stop lever 43 to restore stop lever 43 to its normal position, as shown in Figure 1. In this position lever 43 is spaced slightly from stop 48. Stop levers I9 and typewheel rotating lever 2| are-each provided with a bearing ledge 5|. Stop levers I9 and normal stop lever I8 are each provided with stop extension 52 and latch extension 53, as shown in Figs. 1, 5, 10, 11 and 12.

The upper end of latch I6'forms a bar 29 which extends across and engages all of the latch extensions 53 of stop levers I9 and of normal stop lever I8. Fingers 56 of stop wheel assembly 54 rotate in the path of stop extensions 52 of stop levers I9. Stop wheel assembly 54 provided with' stops 56 over degrees of its circumference is fixed to shaft 5 and comprises four rows of stop fingers each row of stops doubling in number over the previous row, the first row having one stop, the next two, the next four, and the last eight stops. One additional stop 55 is provided which engages with normal stop lever I8 in the normal stop position and holds shaft 5 against rotation, as shown in Figures 1 and 9. When armature lever 36 is moved against stop screw 42 it first releases stop lever 43 from engagement with orientable stop member 9, permitting shaft 2 and cam assembly 8 to rotate, as explained above. Cam I3 thereupon operates type wheel rotating lever 2| and thereafter the'four cams I I operate the four stop levers I9 in succession. If armature lever 36 remains against stop 42, levers 2| and I9 will pivot on latch I6, the elongated bearing aperture in the levers permitting them to move vertically without rotation on stud I5, Fig. 12. When, however, armature lever 36 is moved to the attracted position away from stop 42, after it has released stop lever 43, fulcrum 39 will be under bearing ledge 5| and if this happens when one of the stop'levers I9 is operated by a cam II, lever I9 will engage fulcrum plate 39 and pivot thereon, see Fig. 11, forcing its latch extension 53 to move latch I6 outwardly and in so doing latch I6 will release normal stop lever .idea into effect.

I8 permitting stop finger assembly 54 and shaft 5 to rotate. Stop extension 52 of the operated stop lever I9 will then be in the path of its row of stop fingers forming part of stop wheel 54 and will again stop shaft 5. The operated stop lever I9 will then become latched on latch I6 and remain there until the next stop lever I9 is operated which, when operated to fulcrum on fulcrum plate 39, will place its stop extension in the path of the stop wheel and release the previously set stop lever. Latch extension 53 will then rest on latch I6 and remain there until the next stop lever is operated to fulcrum on fulcrum plate 39 or until latch I6 is operated by latch release cam III, which occurs at the end of the cycle. By varying the operation of the four stop-levers through the action of armature lever 36, stop wheel 54 and shaft 5 can be set in sixteen diiferent positions including the normal stop position. The parts just described are the same and operate in the same manner as shown and described in my application #95,883 with the exception that in the present invention only four of the stop levers I9 control the positioning of stop wheel 54 and therefore 16 instead of 32 positions of the stop wheel are obtained and stop wheel 54 makes a maximum of one-half revolution during each selecting cycle. A- somewhat more detailed explanation of the operatlonof stop levers I9 and stop wheel 54 is given in my aforementioned application #953383.

The parts described above are the same and bear the same reference numerals as in my aforementioned application #150,384. In that disclosure thirty-two selections were obtained by using the first selective impulse to shift the printing to a second group of type. A shifting mechanism for the type wheel operated under control of the first unit of the code was provided to carry this In the present disclosure, as shown in Figures 1, 2 and 3, thirty-two selections are obtained by rotating the type wheel .through an arc of 180 degrees by a mechanism whose operation is controlled by the first selective impulse but operates independently of the remaining selective impulses. As in my application #150,384, this operation is controlled by a lever 2| and a release lever 24. The progressive stops are placed on only 180 degrees of the circumference of the stop wheel and only one normal stop is provided, which is unlike the arrangement set forth in my application #150,384 wherein the stop wheel has two complete sets of. progressive stops and two normal stops. In the present invention the type, wheel I84 is provided with 32 possible printing positions about its circumference and makes one turn for each operating cycle including the stop for printing. The stop wheel 8 makes any of sixteen selections while it is revolving through an arc of 180. After the printing operation it is released and continues to re-' volve until stop 55 engages with projection 52 completing one revolution. The parts cooperatev placed between flanges 65 of a sleeve 66 which is slidably and rotatably mounted on shaft 5 and shaft 61, the latter carrying type wheel I04, A pin 68, fast in shaft 5, works. in a diagonally placed slot 69 in sleeve 66, and a pin 'II, fast in shaft 61, works in a diagonally placed slot 12 in sleeve 66. The slots 69 and 12 are so formed that when sleeve 66 is moved to the right along the shaft 5 and 61 against the tension of spring 13, shaft 61 is rotated 180 degrees with respect to shaft 5. In the operation of the device, shaft 5 is either rotated through the friction clutch 3 or is held stationary by stop |B or one of the stops I9; shaft 61, being connected to shaft 5 by sleeve 66 and pins 68 and 1|. rotates with shaft 5 as well as being rotated under the influence of the sliding motion of sleeve 66. The normal position of sleeve 66 is as shown in Figures 1 and 2, that is, when it is moved to the left under the influence of spring 13 and when pins 68 and 1| are at the right hand end of slots 69 and 12 respectively. A face cam 14 is fixed to shaft 2 and rotates therewith and lever 6| is engaged by cam I4 when placed in its path by the operation of lever 59.

As in my previous applications above referred to, it is intended to operate this telegraph receiver in circuit with a transmitter sending alnocurrent start impulse, five selecting impulses which may be either current or no-current according to the character transmitted, and a current stop condition. It is to be understood that this arrangement may be varied as desired and that the number of selecting impulses may be increased or reduced in accordance with the code to be used.

The operation of the parts heretofore described is as follows:

The general operation of the selecting mechanism, which includes the parts shown in Figure 1 and numbered from 1 to 57, is described and explained in my application #150,384 in which the same parts bear the same reference numerals. The operation of levers 2| and 23 and shaft 51 by the first selective impulse through the joint action of magnet 34, armature 36, pivot 39 and cam I3, is also fully explained inapplication #150,384. To briefly repeat a description of the operation of the selecting mechanism: It is assumed that magnet 34 is connected in the circuit of a five-unit code start-stop transmitter and that shaft 2 when released is rotated in timed relation with the received signals, by gear I and friction clutch 6, and that shaft 5 is under rotative tension through friction clutch and gears 4, 3 and I which are rotated by a motor 29. The normal stop current on the line holds armature -36 attracted and cam assembly 8 fixed to shaft 2 is held stationary by stop arm 43. When a group of signals are received on magnet 34 the first or start impulse, which is no current, releases armature 36, spring 46 then operates stop lever 45 to release cam assembly 8 and shaft 2 as explained above. The then following selective impulses operate armature 36 while cams I3 and II operate levers 2| and I9 in succession and in timed relation with the received signals. Cam i3 operates lever 2| during the time of the first selective impulse and earns operate levers |9 in succession during the remaining selective impulses The first lever l9 to be operated by the joint action of armature 36 and its cam II, that is when lever |9 pivots on fulcrum plate 39 while it is being operated by its cam operates the universal latch l6 and releases normal stop lever l8 from engagement with stop 55 forming part of stop wheel 54 which thereupon rotates and ultimately assumes its selected position in accordance with the successive operations and setting of stop levers |9. Before cam assembly 8 has made a complete revolution, cam l releases the last set stop lever l9 and restores normal stop lever I 8. The selected character is recorded during the time interval between the setting of the last lever I9 and the operation of cam W on release latch l6.

As in my application #150,384, the second, third, fourth and fifth-selective impulses control the positioning of the stop wheel through an, arc

of 180 degrees in sixteen possible settings. Thirty-two selections are obtained by revolving the type wheel an additional 180 degrees under control of the first selective impulse during the time period of the following selective impulses which is accomplished in the following manner: When the first selective'impulse is of a nature to place fulcrum plate 39 under notch of selector lever 2| when that is operated by its cam 13, lever 2| is moved to rotate shaft 51 through lever 23 and connecting pin 22, lifting lever 59 which is connected thereto. Fig. '7 shows lever 2| in this position and latched on latch 25. The extension 60 of lever 59 thereupon raises lever 6| into the path of cam 14 which then engages lever 6|, operating it to move sleeve 66 along the shafts 5 and 61 through roller 64 and flanges 65, shafts 5 and 61 being held in bearings so they cannot move axially but are free to rotate. The operation of lever 6| by cam 14 and the movement of sleeve 66 along shafts 5 and 61 continues during the setting of stop wheel 54 and shaft 5 by the selective operation of the remaining four selective impulses. Lever 6| when operated, remains in engagement with cam 14 as shown in Figure 3, until the selected character is recorded.

In the present type of receiver wherein the selected character is recorded by printing from a typewheel which is inked by an ink roller, difficulty is experienced in rotating the type wheel with the added load of the ink roller, especially during the first part of the rotary selective period. To eliminate the added load of the inking roller during this interval I have provided a cam |0|, Figure 4. operated in timed relation with the selector shaft 2, which acts on a lever I02 carrying the inking roller [03 to raise the inking roller from the typewheel I04 during the time of greatest acceleration of the typewheel.

In Figures 5 and 6 I have shown a preferred modification of stop lever IQ of Figure l including a novel support therefor that may also be employed with lever 2|. While levers l9, as shown in Figures 1, 10, 11 and 12, which are provided with elongated apertures fitting about stud |5 as shown in detail in my application Serial No. 95,883 are satisfactory, the elongated aperture presents a small surface against the round stud |5 and therefore wears considerably. To eliminate such wear with its attendant disadvantages, I have provided a stop lever I9 with a rectangular aperture I05, the aperture preferably having rounded corners as shown at I06. The remaining elements of lever 19' correspond to those of levers |9 as shown by like reference characters. Aperture I05 is preferably of a size to receive a shoe I01, preferably of hardened steel squared with the corners removed at I08, and of a size to permit a sliding fit. By reason of the rectangular shape of aperture I05 and the square shape of shoe I01, lever |9 can be displaced relative to shoe I01 and stud |5 which supports shoe I01 by reason of aperture 108 which is of a size to permit shoe I01 to only rotate about stud i5. A recess I09 is preferably formed in each lever to accommodate the spring Likewise, mechanism for shifting the print hammer, or other printing means employed, to print from either of the. two rows of type on the wheel I04 are provided. This mechanism may be ofany desired type adapted to be controlled by function discs H0 carried by shaft 61. Neither thepn'nting device or typewheel shifting mechanism form a part of the present invention and are hence not disclosed.

It is obvious that the typewheel I0 shown in Figure .1 may be replaced by one or more type barselecting fingers, for. example, as shown in my application #95,883, or that any other recording or indicating device or type selecting mechanism may be used in lieu thereof. It is to be understood that the foregoing de scribed mechanisms are capable of a wide variety I of applications other than those described herein by way of illustration and that the invention is not limited to the particular arrangements described and that considerable modification or rearrangement of the parts is possible without departing from the invention, and that the scope of the appended claims shall not be limited to the foregoing description but all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

What is claimed. and desired to be secured by United States Letters Patent is:

1. A .telegraph receiver comprising. a single receiving magnet, a selecting mechanism responsive to a series of successive selectiveimpulses received by said magnet and rotatable recording means controlled thereby, said selecting mechanism including means under the control of the first selective impulse for rotating the recording means 180 degrees and means under the control of the remaining selective impulses of said series for selecting rotary positions of the recording means throughout 180 degrees.

2. A telegraph receiver in which the selection of characters is controlled by a permutation code selector comprising a recording device, a single magnet, a rotary stop member having rows of stops thereon that progressively double in number as to the rows, stop means actuated by said magnet under the control of all but the first unit of the code for directly and progressively positioning said rotary stop member, a rotary recording device connected to said stop member, and means under control of the first unit of the 'code for rotating said recording device independently of said stop member.

3. A telegraph receiver comprising rotatable recording means; magnetic receiving means responsive to a series of successive selective impulses; a selecting mechanism including, a rotary stop member for selecting rotary positions of said recording means throughout 180 degrees;

. means for selectively positioning said stop members under the control of all but the first selecters thereon; a permutattion code selector capable of a plurality of successive selective opera! tions; and means under control of the first unit of a code signal for rotating the type wheel independently of the selective operation of the remaining units of said code signal.

5. In a telegraph receiver responsive to a. permutation code in which the selective position-.

ing is controlled by a stop wheel provided with stops that progressively double in number, and 'a selecting mechanism for positioning the stopwheel progressively through an arc of 180 degrees in accordance with all but the first unit in said code; and means, under the control of the first unit in the code, for eilfecting independent selective positioning through an arc of 180 degrees in one movement and during the time of the selectiv operation of the remaining code units.

6. A telegraph receiver comprising a receiving magnet, a permutation code selecting mechanism controlled thereby and a stop wheel provided with stops that progressively double in number and arranged to be progressively positioned under the control of said selecting mechanism, a shaft for said stop wheel, a second shaft driven by said stop wheel shaft, a type wheel on said second shaft, and connecting means between said shafts operable under control of the first unit in the code to rotate the type wheel shaft with relation to the 'stop wheel shaft.

7. A telegraph receiver responsive to a permutation code comprising, rotatable recording means connected to a stop wheel provided with rows of stops that progressively double in number; a selecting mechanism for controlling the positions of the stop wheel in accordance with all but the first unit in the code; and means under control of the first unit in the code for shifting the recording means rotatably with respect to the stop wheel.

8. In a telegraph printer responsive toreceived signals, a type wheel, a stop wheel having rows of stops that progressively double in number as to the rows, an adjustable connection between said type wheel and said stop wheel, a

selecting mechanism to progressively stop the stop wheel in accordance with the received signals, and means to adjust said connection between said type wheel and said stop wheel to revolve the type wheel with respect to the stop wheel under the control of one of the units in the code. V

9. In a telegraph printer responsive to received signals, a receiving magnet, a selecting mechanism controlled thereby to position a stop wheel provided with rows of stops that progressively double in number in accordance with the received signals, a type wheel connected to said stop wheel, an inking roller for said'type wheel, and means operated in timed relation with the received signals to permit contact between the inking roller and the type wheel only during selected intervals to thereby reduce the load on the typewheel during periods of its greatest acceleration.

10. A telegraph printer in which atype wheel is positioned progressively to its final printing position, an inking roller for said type wheel, andmeans operated in timed relation with the progressive positioning of the type wheel to release the contact between the inking roller and the type wheel to thereby reduce the load on the type wheel during periods of its greatest progressive steps.

11. A telegraph receiver comprising a receivmeans responsive to a series of successive selecin: magnet; a selecting mechanism responsive to a series of successive selective impulses; and

recording means controlled thereby; said selecting mechanism including means underthe control'of one of said selective impulses for rotating said recording meansthrough a part of a revolution and means, under the control of the remaining selective impulses and including stop means, for selecting rotary positions of the recording means throughout an additional part of a revolution. 7 g

12. A telegraph receiver in which the selection of character is controlled by a permutation code selector comprising a magnet, a rotary stop member having rows of stops thereon that progressively double in number as to the rows, stop means under the control "of said magnet to directly and progressively position said rotary stop member under the control of all but one unit of the code, a rotary recording device connected to said stop member, and means under control of the remaining unit of said code to rotate said recording device independently of said rotary stop member. 1

13. A telegraph receiver comprising recording means arranged to rotate, magnetic receiving tive impulses, a selecting mechanism, a rotary stopmember arranged to be selectively positioned by said selecting mechanism under the control of all but one of said impulses, and means under control of said one impulse to rotate said recording means through an arc of 180 degrees during the operating time of the remaining impulses.

14. In a telegraph printer responsive to received signals, a type wheel, a'stop wheel, selecting mechanism to progressively stop said stop wheel in accordance with the received signals, .and means to drive said type wheel from said stop wheel comprising a pair of aligned shafts, respectively secured to each of said wheels, a single sleeve mounted on each of said shafts and freely rotatable thereon with a pair of diagonal slots therein, and a pin on each of said shafts toenga ge said slots and secure said shafts in aligning relation. Y

15. In a telegraph printer responsive to a series of successive lmpulses, a type wheel, a stop wheel,

selecting mechanism to progressively stop said stop wheel in accordance with certain of sai impulses, shafts to support each of said wheels, said shafts being axially aligned, a sleeve connecting said shafts and freely rotatable thereon with diagonal slots therein, a pin on each of said shafts positioned to engage said slots, and means controlled by a remaining impulse to'shift .said sleeve axially on said shafts to vary the relative positions thereof.

16. In a printing telegraph receiver;"printing means; stop means for positioning said printing means; a pivot;"a series of selector members for said stop means; and a series of shoes rotatabl'y supported on said pivot and arranged to support said selector member for both rotation and radial displacement.

17. The combination as claimed in claim 16 wherein each of said selector members are provided with a rectangular aperture and said shoes are formed substantially as a square with each side thereof substantially equal to the width of said aperture whereby said selector member can slide on said shoe through the length of said aperture. j

18. In a telegraph printer, the combination set forth in claim 15, wherein said slots are in diagonally opposite position to rotate one of said shafts 180 'degrees relative to the remaining shafts when said sleeve is shifted.

19. In a telegraph receiver, the combination set forth in claim 15, wherein means are provided for shifting said sleeve in synchronism with the operation of said selecting mechanism when the impulse for shifting said sleeve is received.

20. In a telegraph receiver responsive to a series of received signals, a stop wheel, selecting means toposition said stop wheel in accordance with certain of said received signals, a type wheel, shafts to support said type wheel and said stop wheel, and means responsive to one of said reserved-signals for rotating said type wheel shaft 180 degrees relative to said stop wheel shaft while maintaining a driving connection therebetween, said means comprising a single sleeve on the adjacent ends of said shafts, diagonally positioned pin and slot connections between each of said shafts and said sleeve, and'means to shift said sleeve comprising a collar on said sleeve, a lever to engage said collar, a cam driven in synchronism with said selecting means, and means responsive to the character of one of said received signals to shift said lever into the path of said cam.

21. A telegraph receiver comprising a'receiving magnet; a permutation code selecting mechanism controlled by said magnet; a stop wheel provided with stops that progressively. double in number and arranged to be progressively positioned by said selecting mechanism; rotating type selecting mechanism positioned by said stop wheel; and additional means, operable under the control of permutation code. selecting mechanism, for rotating said type selecting mechanism independently of said stop wheel.

22. A telegraph receiver comprising a receiving magnet; a permutation code selecting mechanism controlled by said magnet; a stop wheel provided with stops that progressively double in number and arranged to be progressively positioned throughout an arc of 180 degrees by said select ing mechanism; a-rotatable member positioned by said stop wheel; and separate means operable under control of said permutation code selecting mechanism, for rotating the rotatable member through an arc of an additional 180 degrees.

23. A telegraph receiver comprising a receiving magnet; a permutation code selecting mechanism controlled by said magnet; a stop wheel provided and separate said selecting mechanism; a rotatable member positioned by said stop wheel; and independent means, initiated by said permutation code selecting mechanism in response to one of the code signals of a group, for starting an independent rotary movement of said rotatable member.

25. A telegraph receiver comprising a receiving first code signal or a group, for stator-immindependent rotary movement of said rotntable member; and means for continuing said inde'-' pendent rotary movement through an am 01180 degrees during the operating time of the fir mentioned progressive rotary movement. 1'

' EDWARD 

